Question

Identify the diagram A and B.

A) A= Palmate compound leaf ,B= Whorled phyllotaxy
B) A=Pinnate compound leaf ,B= Whorled phyllotaxy
C) A= Whorled phyllotaxy, B= Palmately compound leaf
D) None of these

Answer 1

Leaves are classified into different categories based on how their lamina is divided. Lamina is also termed as the blade of the leaf.

Complete answer:
Let us first analyze the structure of the leaves given in the figure to identify them
Figure A: The leaflets of this leaf are radiating outwards from the point where the petiole of the leaf ends. Also, all the leaflets are originating from a single common point. The leaflets are clustered together forming a palm like structure and a joint is found between the leaflet and the point of its attachment. These characteristic features resemble that of a palmate compound leaf.

Figure B: In this figure more than two or three leaves are present at a single node.It shows whorled phyllotaxy leaf arrangement. These kinds of leaves are found in Alstonia plants. Other examples of whorled phyllotaxy include aspergula and nerium.

Option A: This option matches the above description and identification of the leaf in the figures. Therefore, this is the correct option.

Option B and C: These options do not match the above identification of figure A and B. Therefore, this is the incorrect option.

Option D: Since one of the above mentioned options is correct.Therefore, this is the incorrect option.

Thus, the correct answer is option (A) A= Palmate compound leaf, B= Whorled phyllotaxy.

Note: Pinnate compound leaves occur in two rows and no joint is found in them unlike palmate compound leaves. In alternate phyllotaxy, a single leaf is present at each node.